Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 167 · 40 questions

What you do (Find the experiment, use the idea): 1. Read the question and find its experiment. 2. Use that experiment’s idea — acid and base, indicator colours, chemical change, what seeds and yeast need, transpiration, crystals or filtering. 3. For a fair-test question, find what is changed, kept the same and measured. 4. For a safety question, choose what keeps everyone safe.

1. 1.🫗 Why does filtered muddy water look clearer? (a) the filter adds soap (b) the mud dissolves (c) the filter traps mud (d) the water evaporates
2. 2.🛟 Which safety rule fits the fizzy balloon experiment? (a) put it in your mouth (b) seal it in a glass jar (c) keep it away from eyes (d) shake it near your face
3. 3.🧺 Do we need an empty bottle for the fizzy balloon? (a) not needed (b) needed
4. 4.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns blue (b) it turns black (c) it stays yellow (d) it turns red
5. 5.⚖️ Fair test — do seeds need water to sprout? True or false: the same bowls is what we measure. (a) False (b) True
6. 6.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) cold water to rinse (b) a jar with a tight lid (c) fresh cream (d) a mirror
7. 7.True or false: sunlight is something yeast needs. (a) True (b) False
8. 8.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “the cream temperature”? (a) we change it (b) we measure it (c) we keep it the same
9. 9.True or false: bad grains from rice is done by sieving. (a) True (b) False
10. 10.🫧 Is detergent water an acid, a base or neutral? (a) neutral (b) an acid (c) a base
11. 11.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “the same jar”? (a) we change it (b) we measure it (c) we keep it the same
12. 12.🧺 Which of these is needed for the fizzy balloon? (a) sugar (b) a funnel or spoon (c) a magnet (d) a mirror
13. 13.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) sunlight (b) a potted plant (c) a clear plastic bag (d) a magnet
14. 14.🌱 Why do the seeds on dry cotton not sprout? (a) they have no salt (b) they have no soil (c) they are too wet (d) they have no water
15. 15.🧈 Can this change be undone: melting ice? (a) can be undone (b) cannot be undone
16. 16.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the kind of salt”? (a) we change it (b) we keep it the same (c) we measure it
17. 17.🛟 Who should use the hot iron in the secret message experiment? (a) whoever is fastest (b) any child (c) only an adult (d) the youngest child
18. 18.True or false: a cotton bud is not needed for the secret lemon message. (a) False (b) True
19. 19.🛟 Why is a plastic jar a good choice for shaking? (a) it is heavier (b) it will not break (c) it is magnetic (d) it is hotter
20. 20.🟡 Which of these turns turmeric reddish-brown? (a) lemon juice (b) tamarind water (c) plain water (d) baking soda water
21. 21.🫗 Which of these is done by handpicking? (a) salt from sea water (b) gravel from fine sand (c) small stones from dal (d) tea leaves from tea
22. 22.🛟 Lemon juice stings cuts and eyes. What should you do after the experiment? (a) rub your eyes (b) lick your fingers (c) wash your hands (d) skip washing
23. 23.True or false: yeast is needed for the leafy bag test. (a) False (b) True
24. 24.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the amount of water”? (a) we keep it the same (b) we change it (c) we measure it
25. 25.🟡 Why does soap solution change turmeric’s colour? (a) soap water is a base (b) soap is hot (c) soap is an acid (d) soap is magnetic
26. 26.🫗 How do we separate chaff from wheat grain? (a) sieving (b) filtering (c) evaporating (d) winnowing
27. 27.🛟 Which rule keeps the turmeric test safe? (a) sniff each bottle hard (b) mix bathroom cleaners (c) use only kitchen items (d) sip each liquid
28. 28.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “sun or shade”? (a) we measure it (b) we keep it the same (c) we change it
29. 29.True or false: white paper strips is needed for the turmeric test. (a) False (b) True
30. 30.🧈 Which of these is a change that can be undone? (a) rusting iron (b) milk turning to curd (c) melting ice (d) cooking an egg
31. 31.🔮 Predict: the adult irons for only one second. What happens? (a) writing stays faint (b) it gets darker (c) writing turns green (d) the paper floats
32. 32.True or false: seeds on dry cotton does not sprout. (a) False (b) True
33. 33.🍞 Does yeast need vinegar to make gas? (a) yeast needs it (b) yeast does not need it
34. 34.⚖️ Fair test — do seeds need water to sprout? Which of these is kept the same? (a) the same bowls (b) wet or dry cotton (c) how many seeds sprout
35. 35.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is what we measure? (a) the same paper (b) the iron setting (c) how dark the writing is (d) the same cotton bud
36. 36.True or false: melting ice is a change that cannot be undone. (a) True (b) False
37. 37.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the same bottle is the one thing we change. (a) True (b) False
38. 38.🪴 Which part of a plant does this job: make food in sunlight? (a) flower (b) stem (c) leaves (d) roots
39. 39.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) a balloon (c) a dropper or spoon (d) water
40. 40.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a balloon (b) a magnet (c) a funnel or spoon (d) a tray for spills

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